Although Nokia have a standard OS globally for this particular device, when performing over the air updates, they only permit approved builds to receive the update.
Nokia gives each individual network the opportunity to test the update to make sure it is optimised for use on the network. Because all networks have different platforms and services, the roll out time between networks can vary.
Our testing team at EE let the manufacturer know of any defects they find as quickly as possible, allowing Nokia to make any necessary changes in a timely manner.
We know it can be frustrating when you don’t have the latest update immediately, but we wouldn’t want an update to reach your phone that is detrimental to your user experience.